Nicolaides-Baraitser syndrome

Nicolaides-Baraitser syndrome (NCBRS), also known as sparse hair-mental retardation syndrome, is a rare genetic disorder caused by pathogenic variants in the SMARCA2 gene, which encodes a component of the SWI/SNF chromatin remodeling complex. The condition is characterized by sparse scalp hair, distinctive facial features, distal limb anomalies, and intellectual disability. Facial features become more recognizable with age and typically include a triangular face, thick and broad nasal tip, wide mouth with a thin upper lip, and prominent ears. The sparse hair is often present from birth and may improve somewhat over time. The syndrome affects multiple body systems. Neurological involvement is prominent, with moderate to severe intellectual disability, seizures (occurring in approximately 50% of patients), and significant speech and language impairment. Skeletal abnormalities include short stature, brachydactyly (short fingers), prominent interphalangeal joints, and broad distal phalanges. Behavioral features may include hyperactivity, self-injurious behavior, and autistic traits. Microcephaly is frequently observed. Some individuals may also have feeding difficulties in infancy and skin abnormalities such as eczema. There is currently no cure or disease-specific treatment for Nicolaides-Baraitser syndrome. Management is supportive and multidisciplinary, focusing on seizure control with antiepileptic medications, speech and language therapy, occupational therapy, physical therapy, and educational support tailored to the individual's developmental needs. Regular monitoring by a neurologist, geneticist, and developmental pediatrician is recommended. Early intervention programs can help optimize developmental outcomes.

Common questions about Nicolaides-Baraitser syndrome